chr8-61503378-C-T

Position:

chr8-61503378-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_004318.4(ASPH):c.2258G>A(p.Arg753His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000538 in 1,605,724 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R753L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00057 ( 0 hom. )

Consequence

ASPH
NM_004318.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.328

Variant links:

Genes affected

ASPH (HGNC:757): (aspartate beta-hydroxylase) This gene is thought to play an important role in calcium homeostasis. The gene is expressed from two promoters and undergoes extensive alternative splicing. The encoded set of proteins share varying amounts of overlap near their N-termini but have substantial variations in their C-terminal domains resulting in distinct functional properties. The longest isoforms (a and f) include a C-terminal Aspartyl/Asparaginyl beta-hydroxylase domain that hydroxylates aspartic acid or asparagine residues in the epidermal growth factor (EGF)-like domains of some proteins, including protein C, coagulation factors VII, IX, and X, and the complement factors C1R and C1S. Other isoforms differ primarily in the C-terminal sequence and lack the hydroxylase domain, and some have been localized to the endoplasmic and sarcoplasmic reticulum. Some of these isoforms are found in complexes with calsequestrin, triadin, and the ryanodine receptor, and have been shown to regulate calcium release from the sarcoplasmic reticulum. Some isoforms have been implicated in metastasis. [provided by RefSeq, Sep 2009]

ASPH links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03776169).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ASPH	NM_004318.4 linkuse as main transcript	c.2258G>A	p.Arg753His	missense_variant	25/25	ENST00000379454.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ASPH	ENST00000379454.9 linkuse as main transcript	c.2258G>A	p.Arg753His	missense_variant	25/25	1	NM_004318.4	P3	Q12797-1
ASPH	ENST00000541428.5 linkuse as main transcript	c.2171G>A	p.Arg724His	missense_variant	25/25	2		A2	Q12797-10

Frequencies

GnomAD3 genomes

AF:

0.000197

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000338

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000320

AC:

AN:

243966

Hom.:

AF XY:

0.000303

AC XY:

AN XY:

132018

show subpopulations

Gnomad AFR exome

AF:

0.000126

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000101

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000465

Gnomad NFE exome

AF:

0.000658

Gnomad OTH exome

AF:

0.000169

GnomAD4 exome

AF:

0.000574

AC:

834

AN:

1453552

Hom.:

Cov.:

AF XY:

0.000556

AC XY:

402

AN XY:

722688

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000228

Gnomad4 ASJ exome

AF:

0.0000385

Gnomad4 EAS exome

AF:

0.0000255

Gnomad4 SAS exome

AF:

0.0000471

Gnomad4 FIN exome

AF:

0.000113

Gnomad4 NFE exome

AF:

0.000726

Gnomad4 OTH exome

AF:

0.000283

GnomAD4 genome

AF:

0.000197

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000338

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000877

Hom.:

Bravo

AF:

0.000325

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000930

AC:

ExAC

AF:

0.000387

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 03, 2022

The c.2258G>A (p.R753H) alteration is located in exon 25 (coding exon 25) of the ASPH gene. This alteration results from a G to A substitution at nucleotide position 2258, causing the arginine (R) at amino acid position 753 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 28, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The histidine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. This variant has not been reported in the literature in individuals affected with ASPH-related conditions. This variant is present in population databases (rs141861375, gnomAD 0.06%). This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 753 of the ASPH protein (p.Arg753His). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.070

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.72

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.59

D;.

Eigen

Benign

-0.40

Eigen_PC

Benign

-0.25

FATHMM_MKL

Benign

0.60

LIST_S2

Benign

0.83

T;T

M_CAP

Benign

0.0065

MetaRNN

Benign

0.038

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.94

L;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.24

PROVEAN

Benign

-2.3

N;N

REVEL

Benign

0.052

Sift

Benign

0.27

T;T

Sift4G

Benign

0.14

T;T

Polyphen

0.0080

B;.

Vest4

0.028

MVP

0.13

MPC

0.042

ClinPred

0.060

GERP RS

1.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.083

gMVP

0.25

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over